29bdiversity4

29bdiversity4 - Four major phases in plant evolution A....

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Four major phases in plant evolution A. nonvascular plants (bryophytes) B. seedless vascular plants C. naked seed plants (gymnosperms) D. flowering plants (angiosperms) 1
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Figure 29.3 Some highlights of plant evolution Four major groups Cuticle and retention of embryo in maternal tissue: The Embryophyte 2
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Major structural adaptations : Improved vascular tissue : Tracheids evolve  vessel elements. Both are present Group 4: angiosperms (little room = ovary) flowering plants 3
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Major structural adaptations : Improved vascular tissue : Group 4: angiosperms (little room = ovary) flowering plants No membranes   block  the perforations  of sieve tube members Circulation much improved over seedless and gymnosperms 4
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Male:  Flower Pollinators carry from flower to flower less pollen required by male  specific transport less wasteful than wind Major concept of energy conservation and fitness. 5
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This note was uploaded on 04/24/2008 for the course BIO 111 taught by Professor Lynsajdak during the Spring '08 term at Rochester.

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29bdiversity4 - Four major phases in plant evolution A....

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